So I've just received my latest bill for 6 months and it has increased by £92 compared to the last six months!! I am 
and have not used anymore water than normal.
Have been on maternity leave the last three weeks so the only thing I can think of is extra toilet flushes - would that really increase my bill so much?! Water company is sending out an engineer to check for leaks but I can't see how it can increase so dramatically